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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_SSL_SSL_PLATFORM_KEY_UTIL_H_
#define NET_SSL_SSL_PLATFORM_KEY_UTIL_H_
#include <stddef.h>
#include <stdint.h>
#include <optional>
#include <vector>
#include "base/containers/span.h"
#include "base/memory/scoped_refptr.h"
#include "base/task/single_thread_task_runner.h"
#include "net/base/net_export.h"
#include "third_party/boringssl/src/include/openssl/base.h"
namespace net {
class X509Certificate;
// Returns a task runner to serialize all private key operations on a single
// background thread to avoid problems with buggy smartcards. Its underlying
// Thread is non-joinable and as such provides
// TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN semantics.
NET_EXPORT_PRIVATE scoped_refptr<base::SingleThreadTaskRunner>
GetSSLPlatformKeyTaskRunner();
// Returns the public key of |certificate| as an |EVP_PKEY| or nullptr on error.
bssl::UniquePtr<EVP_PKEY> GetClientCertPublicKey(
const X509Certificate* certificate);
// Determines the key type and maximum signature length of |certificate|'s
// public key. |*out_type| will be set to one of the |EVP_PKEY_*| values from
// BoringSSL.
NET_EXPORT_PRIVATE bool GetClientCertInfo(const X509Certificate* certificate,
int* out_type,
size_t* out_max_length);
// Parses a DER-encoded SPKI buffer and returns the public key as an |EVP_PKEY|,
// or nullptr on error.
NET_EXPORT_PRIVATE bssl::UniquePtr<EVP_PKEY> ParseSpki(
base::span<const uint8_t> spki);
// Determines the key type and maximum signature length of the public key
// encoded in |spki|. |*out_type| will be set to one of the |EVP_PKEY_*|
// values from BoringSSL.
NET_EXPORT_PRIVATE bool GetPublicKeyInfo(base::span<const uint8_t> spki,
int* out_type,
size_t* out_max_length);
// Returns the encoded form of |digest| for use with RSA-PSS with |pubkey|,
// using |md| as the hash function and MGF-1 function, and the digest size of
// |md| as the salt length.
std::optional<std::vector<uint8_t>> AddPSSPadding(
EVP_PKEY* pubkey,
const EVP_MD* md,
base::span<const uint8_t> digest);
} // namespace net
#endif // NET_SSL_SSL_PLATFORM_KEY_UTIL_H_
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